Since no-one seems to have replied so far, it seems that no-one on this mailing list has used Cardbox on this configuration.
I can see no reason at all why Cardbox should not work on the configuration you mention. It is a standard Windows application and does not do anything outstandingly clever that might be disturbed by the Parallels environment.
As for your "wishful thinking" - yes, it *is* wishful thinking, but it is wishful thinking which we wholeheartedly share. Unfortunately, although I think the Macintosh platform is far superior (or have I been seduced by the marketing?), the size of the potential market is too small to justify any big development effort.
On the other hand, now that the same processors are used for Windows and MacOS, there is no reason why Apple should not take a Windows-on-Unix project such as Wine and put enough resources into it so that it becomes a viable proposition for a wide class of "ordinary" Windows programs (except that this might risk reducing the impetus towards proper MacOS software). The Cider project, perhaps?
